build nix package by using deps_nix instead of mix2nix

default.nix

@@ -27,7 +27,8 @@ mixRelease rec {
 
   nativeBuildInputs = [ git cmake ];
 
-  mixNixDeps = import ./mix.nix {
+  # Update deps.nix by running `mix deps.nix`
+  mixNixDeps = import ./deps.nix {
     inherit lib;
     beamPackages = beam_nox.packages.erlang;
     overrides = (final: prev:
@@ -53,56 +54,6 @@ mixRelease rec {
             cp $src/priv/cldr/locales/* $out/lib/erlang/lib/ex_cldr-${old.version}/priv/cldr/locales/
           '';
         });
-        # Upstream issue: https://github.com/bryanjos/geo_postgis/pull/87
-        geo_postgis = prev.geo_postgis.overrideAttrs (old: {
-          propagatedBuildInputs = old.propagatedBuildInputs ++ [ final.ecto ];
-        });
-
-        # The remainder are Git dependencies (and their deps) that are not supported by mix2nix currently.
-        web_push_encryption = buildMix rec {
-          name = "web_push_encryption";
-          version = "0.3.1";
-          src = fetchFromGitHub {
-            owner = "danhper";
-            repo = "elixir-web-push-encryption";
-            rev = "6e143dcde0a2854c4f0d72816b7ecab696432779";
-            sha256 = "sha256-Da+/28SPZuUQBi8fQj31zmMvhMrYUaQIW4U4E+mRtMg=";
-          };
-          beamDeps = with final; [ httpoison jose ];
-        };
-        icalendar = buildMix rec {
-          name = "icalendar";
-          version = "unstable-2022-04-10";
-          src = fetchFromGitHub {
-            owner = "tcitworld";
-            repo = name;
-            rev = "1033d922c82a7223db0ec138e2316557b70ff49f";
-            sha256 = "sha256-N3bJZznNazLewHS4c2B7LP1lgxd1wev+EWVlQ7rOwfU=";
-          };
-          beamDeps = with final; [ mix_test_watch ex_doc timex ];
-        };
-        rajska = buildMix rec {
-          name = "rajska";
-          version = "1.3.3";
-          src = fetchFromGitHub {
-            owner = "tcitworld";
-            repo = name;
-            rev = "0c036448e261e8be6a512581c592fadf48982d84";
-            sha256 = "sha256-4pfply1vTAIT2Xvm3kONmrCK05xKfXFvcb8EKoSCXBE=";
-          };
-          beamDeps = with final; [ ex_doc credo absinthe excoveralls hammer mock ];
-        };
-        exkismet = buildMix rec {
-          name = "exkismet";
-          version = "0.0.3";
-          src = fetchFromGitHub {
-            owner = "tcitworld";
-            repo = name;
-            rev = "8b5485fde00fafbde20f315bec387a77f7358334";
-            sha256 = "sha256-ttgCWoBKU7VTjZJBhZNtqVF4kN7psBr/qOeR65MbTqw=";
-          };
-          beamDeps = with final; [ httpoison ex_doc credo doctor dialyxir ];
-        };
 
       });
   };

flake.nix

@@ -81,14 +81,6 @@
               };
 
           default = self.packages."${system}".mobilizon;
-
-          # Update local Mobilizon definition
-          update =
-            pkgs.writeShellScriptBin "update" ''
-              set -eou pipefail
-
-              ${pkgs.mix2nix}/bin/mix2nix ./mix.lock > mix.nix
-            '';
         });
 
       devShells = forAllSystems (system:
@@ -137,7 +129,6 @@
               buildInputs =
                 with pkgs; [
                   elixir
-                  mix2nix
                   cmake
                   imagemagick
                   nodejs
@@ -147,6 +138,7 @@
                     runtimeInputs = [ elixir nodejs ];
                     text = ''
                       mix deps.get
+                      mix deps.nix
                       mix deps.compile
                       mix phx.digest
                       npm install
@@ -230,7 +222,7 @@
       };
 
       checks = forAllSystems (system: {
-        inherit (self.packages.${system}) mobilizon update;
+        inherit (self.packages.${system}) mobilizon;
         nixosTest =
           let
             pkgsMobilizon = import nixpkgs {

mix.exs

@@ -239,7 +239,9 @@ defmodule Mobilizon.Mixfile do
       {:doctor, "~> 0.21", only: :dev},
       {:haversine, "~> 0.1.0"},
       {:ecto_dev_logger, "~> 0.7"},
-      {:credo_code_climate, "~> 0.1.0", only: [:dev, :test]}
+      {:credo_code_climate, "~> 0.1.0", only: [:dev, :test]},
+      # Generate nix dependencies
+      {:deps_nix, "~> 0.0", only: :dev}
     ] ++ oauth_deps()
   end
 

mix.lock

@@ -19,6 +19,7 @@
   "dataloader": {:hex, :dataloader, "2.0.0", "49b42d60b9bb06d761a71d7b034c4b34787957e713d4fae15387a25fcd639112", [:mix], [{:ecto, ">= 3.4.3 and < 4.0.0", [hex: :ecto, repo: "hexpm", optional: true]}, {:opentelemetry_process_propagator, "~> 0.2.1", [hex: :opentelemetry_process_propagator, repo: "hexpm", optional: true]}, {:telemetry, "~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "09d61781b76ce216e395cdbc883ff00d00f46a503e215c22722dba82507dfef0"},
   "db_connection": {:hex, :db_connection, "2.6.0", "77d835c472b5b67fc4f29556dee74bf511bbafecdcaf98c27d27fa5918152086", [:mix], [{:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "c2f992d15725e721ec7fbc1189d4ecdb8afef76648c746a8e1cad35e3b8a35f3"},
   "decimal": {:hex, :decimal, "2.1.1", "5611dca5d4b2c3dd497dec8f68751f1f1a54755e8ed2a966c2633cf885973ad6", [:mix], [], "hexpm", "53cfe5f497ed0e7771ae1a475575603d77425099ba5faef9394932b35020ffcc"},
+  "deps_nix": {:hex, :deps_nix, "0.5.2", "81af6ec4614de6b1012bf335338ededb61b4153b4b0eae62bc12886fc84b6578", [:mix], [], "hexpm", "8b6bbd21dfefa6e2b432d9f3228d66c88189b1b382eb2c0cdb8f14567118b104"},
   "dialyxir": {:hex, :dialyxir, "1.4.3", "edd0124f358f0b9e95bfe53a9fcf806d615d8f838e2202a9f430d59566b6b53b", [:mix], [{:erlex, ">= 0.2.6", [hex: :erlex, repo: "hexpm", optional: false]}], "hexpm", "bf2cfb75cd5c5006bec30141b131663299c661a864ec7fbbc72dfa557487a986"},
   "digital_token": {:hex, :digital_token, "0.6.0", "13e6de581f0b1f6c686f7c7d12ab11a84a7b22fa79adeb4b50eec1a2d278d258", [:mix], [{:cldr_utils, "~> 2.17", [hex: :cldr_utils, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: true]}], "hexpm", "2455d626e7c61a128b02a4a8caddb092548c3eb613ac6f6a85e4cbb6caddc4d1"},
   "doctor": {:hex, :doctor, "0.21.0", "20ef89355c67778e206225fe74913e96141c4d001cb04efdeba1a2a9704f1ab5", [:mix], [{:decimal, "~> 2.0", [hex: :decimal, repo: "hexpm", optional: false]}], "hexpm", "a227831daa79784eb24cdeedfa403c46a4cb7d0eab0e31232ec654314447e4e0"},